^ Free Shipping calculated before any applicable sales tax, coupon codes and shipping charges are applied; valid only within the 48 contiguous . states. A surcharge of $ will be applied to shipments to AK, AS, FM, GU, HI, MH, MP, PR, and VI. International shipping costs vary depending on weight and destination. Additional charges may apply on orders over $1,000 USD.

Puritan’s Pride® reserves the right to discontinue any program or offer at any time. To expedite orders, we may substitute smaller size bottles if ordered quantity is unavailable. While we make every effort to ensure the accuracy of all information, we reserve the right to make corrections if an error does occur. Prices subject to change and may vary online.

Do not consider WebMD User-generated content as medical advice. Never delay or disregard seeking professional medical advice from your doctor or other qualified healthcare provider because of something you have read on WebMD. You should always speak with your doctor before you start, stop, or change any prescribed part of your care plan or treatment. WebMD understands that reading individual, real-life experiences can be a helpful resource but it is never a substitute for professional medical advice, diagnosis, or treatment from a qualified health care provider. If you think you may have a medical emergency, call your doctor or dial 911 immediately.

N-Acetyl Carnitine is simply another name for what is usually marketed as Acetyl L-Carnitine for brain and nerve support. Bear in mind that the abbreviation NAC is also used for N-Acetyl Cysteine , which is a precursor for glutathione synthesis in the body. Sometimes the use of abbreviations in the dietary supplement world can be a little confusing—like ALA used for Alpha Linolenic Acid (an Omega-3 Fatty Acid) and Alpha Lipoic Acid (an antioxidant). You have to be really careful about looking at the context to see what the abbreviation is being used for just to be certain.

Specifically, in this study conducted by Patrick Jacobs and colleagues, 24 healthy, exercise trained men consumed either grams of GPLC or a placebo on two different days separated by one week (double blind, cross-over study design). Ninety minutes following ingestion of the assigned treatment, subjects performed five, maximal effort cycle sprint's, each lasting 10 seconds in duration. They were given one minute of “active” recovery between each sprint. The peak and mean power output, as well as the blood lactic acid , was measured for both conditions. Results indicated that power output was up to 15% higher following the glycine propionyl-l-carnitine trials compared to placebo, while post-exercise blood lactic acid was 15-16% lower compared to placebo. These data are in reference to trained men performing repeated cycle sprints. Therefore, it is difficult to extrapolate these findings to other activities.

Propionate-l-carnitine

Specifically, in this study conducted by Patrick Jacobs and colleagues, 24 healthy, exercise trained men consumed either grams of GPLC or a placebo on two different days separated by one week (double blind, cross-over study design). Ninety minutes following ingestion of the assigned treatment, subjects performed five, maximal effort cycle sprint's, each lasting 10 seconds in duration. They were given one minute of “active” recovery between each sprint. The peak and mean power output, as well as the blood lactic acid , was measured for both conditions. Results indicated that power output was up to 15% higher following the glycine propionyl-l-carnitine trials compared to placebo, while post-exercise blood lactic acid was 15-16% lower compared to placebo. These data are in reference to trained men performing repeated cycle sprints. Therefore, it is difficult to extrapolate these findings to other activities.